Although the book is less than 700 pages, the author says that his book is "comprehensive" and is intended to physics freshmen. So is it possible to a book with just about 700 pages to cover all the introductory physics curriculum?

In this sense, the term "introductory physics" means the first two courses that people generally will take in a physics major. So in that sense, yes this book is comprehensive and you will probably learn the same topics that you'll take in your first two physic courses.